BRAIN TEASERS

# Calculate the number 4248

NUMBERMANIA: Calculate the number 4248 using numbers [2, 8, 2, 5, 32, 501] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania

### Loud Train

A man had to attend a large convention in Chicago. On this particular trip he decided to bring his wife. When they arrived at their hotel and were shown to their room, the man said: "You rest here while I register - I'll be back within an hour."
The wife lies down on the bed... just then, an elevated train passes by very close to the window and shakes the room so hard she's thrown out of the bed. Thinking this must be a freak occurrence, she lies down once more. Again a train shakes the room so violently, she's pitched to the floor.
Exasperated, she calls the front desk, asks for the manager. The manager says he'll be right up. The manager (naturally) is sceptical but the wife insists the story is true.
"Look,... lie here on the bed - you'll be thrown right to the floor!"
So he lies down next to the wife... Just then the husband walks in. "What," he says, "are you doing here?"
The manager replies: "Would you believe I'm waiting for a train?"

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### Halley's Comet

In 1910, the Earth passed through the tail of Halley's Comet, the most intimate contact between the Earth and any comet in recorded history. The event was anticipated with dire predictions. Since a few years earlier, astronomers had found the poisonous gas cyanogen in a comet, it was surmised that if Earth passed through the comet's tail everyone would die. Astronomers explained that the gas molecules within the tail were so tenuous that absolutely no ill effects would be noticed. Nevertheless, ignorance bred opportunists selling "comet pills" to the panicked portion of the public to counter the effects of the cyanogen gas. On 20 May, after Earth had passed through the tail, everyone was still alive - with or without taking pills![Image: Halley's Comet and Venus, 1910]
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